One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,10,14)(7,15,17,11)(8,12,9,13)(16,20,18,19)(21,22,27,26)(23,28,32,36)(24,29,35,34)(25,33,31,30)(5,7)(6,11)(8,16)(9,18)(10,17)(12,19)(13,20)(14,15)(21,23)(22,28)(24,33)(25,34)(26,36)(27,32)(29,31)(30,35) involution — undirected(1,2,3,4)(5,8,10,9)(6,12,14,13)(7,16,17,18)(11,19,15,20)(21,24)(22,29)(23,31)(25,32)(26,34)(27,35)(28,30)(33,36)(5,8,10,9)(6,13,14,12)(7,16,17,18)(11,20,15,19)(21,22,27,26)(23,28,32,36)(24,34,35,29)(25,30,31,33)(5,9,10,8)(6,13,14,12)(7,16,17,18)(11,19,15,20)(21,25,27,31)(22,30,26,33)(23,24,32,35)(28,34,36,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.